Stephen Vail (1780–1864) was a founding partner of the Baldwin Locomotive Works in Philadelphia and the creator of the Speedwell Ironworks in Morristown, New Jersey.

[1] Stephen Vail was born in Malapardis, New Jersey on June 28, 1780.

His second wife was Mary Carter Hedges whom he married in 1848.

His third wife was Phoebe Ann Miller whom he married in 1862.

He died in Morristown in June or July 1864.